4 Ports C+L 1528~1610nm Polarization Maintaining Optical Circulator

4 Ports C+L 1528~1610nm Polarization Maintaining Optical Circulator

The 4 Ports C+L 1528~1610nm Polarization Maintaining Optical Circulator is a high-performance, non-reciprocal passive optical device that routes light sequentially from Port 1 → Port 2 → Port 3 → Port 4, while precisely maintaining the polarization state of the transmitted signal. Designed to operate across the C+L wavelength band (1528–1610 nm), it provides broadband performance, low insertion loss, high isolation, high return loss, and an excellent polarization extinction ratio (PER) — ensuring superior signal quality and system stability in advanced optical networks.

Built with PM1550 PANDA fiber, this circulator maintains stable polarization alignment, with the slow axis aligned to the key by default, delivering outstanding environmental stability and long-term reliability. Its compact, robust construction and precision optical design make it ideal for demanding polarization-sensitive applications.

This 4-port polarization-maintaining circulator is widely used in DWDM and CWDM systems, ROADM modules, EDFA and Raman amplifiers, coherent communication networks, and interferometric sensors, where broadband operation and accurate polarization control are required for high-performance optical signal routing.

Specifications

Note: Measured at 25°C. Data exclude connectors; adding connectors increases insertion loss by 0.3 dB, reduces return loss by 5 dB, and lowers extinction ratio by 2 dB. The PM fiber slow axis is aligned to the key by default.

Dimension Drawing (Unit: mm)